JP2010099646A - Strainer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a strainer that satisfies both of firm engaging between split bodies and tight sealing between split bodies taking manufacturing errors into consideration when a case is composed of two or more split bodies. <P>SOLUTION: The strainer 1 includes a filter 5 and the case 3 for housing the filter 5. A fluid that enters the case 3 through an inlet is filtered by the filter 5 and goes out through an outlet. The case 3 is composed of a lower case 7 and an upper case 9. The lower case 7 is equipped with a latch 57 for engaging the lower case 7 with the upper case 9. A sealing part 59 is attached to at least one of the lower case 7 and the upper case 9 apart from the latch 57 to be press-welded to the other. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a strainer for filtering a fluid to be treated such as oil circulating inside an automatic transmission or an internal combustion engine.

  Conventionally, as a strainer of this type, it has a filter and a case that houses the filter, and oil that has flowed into the case through an inflow hole formed in the case is filtered through the filter and then formed in the case. What is comprised so that it may flow out from the made outflow hole is known (for example, refer patent document 1).

The strainer case of Patent Document 1 is formed by combining an upper divided body and a lower divided body that are divided into two parts in the vertical direction and are both formed in a concave shape. The peripheral wall portion of the upper divided body is formed so as to fit inside the peripheral wall portion of the lower divided body. Convex ridges are formed on the outer surface of the peripheral wall of the upper divided body. On the inner side surface of the peripheral wall portion of the lower divided body, a concave strip portion into which the convex strip portion is fitted is formed. The upper divided body and the lower divided body are combined with each other and the space between the two divided bodies is sealed in a state where the protruding portion is fitted into the recessed portion.
JP 2007-54687 A

  However, in the strainer of Patent Document 1, the single ridge portion and the concave ridge portion are used to perform both the coupling of both divided bodies and the seal between the two divided bodies. And if the shape of the concave stripe part is a shape suitable for the coupling of both divided bodies, it may be a disadvantageous shape for securing the sealing performance, and conversely when the shape is advantageous for the sealing performance Is considered to be disadvantageous for the combination of the two split bodies.

  Further, since the divided body constituting the case of Patent Document 1 usually has a manufacturing error within a tolerance range, it is necessary to set the shape of the ridge and the ridge in consideration of this. There are many restrictions on shape setting.

  The present invention has been made in view of such points, and the purpose of the present invention is to form a case with a plurality of divided bodies, while taking into account manufacturing errors, and to firmly bond the divided bodies, The purpose is to ensure both sealing performance between the divided bodies.

In order to achieve the above object, in the first invention,
Filters,
A case for accommodating the filter,
A strainer configured to filter the fluid to be treated that has flowed into the case from the inlet formed in the case through the filter, and to flow out from the outlet formed in the case,
The above case is a combination of the first divided body and the second divided body,
The first divided body is provided with a coupling portion coupled to the second divided body,
At least one of the mating portions of the first and second divided bodies has a configuration in which a seal portion that is pressed against the other is provided apart from the coupling portion.

In the second invention, in the first invention,
The connecting portion of the first divided body is bonded to the second divided body by a resin,
The seal portion is positioned on the inner side of the case with respect to the coupling portion.

In the third invention,
Filters,
A case for accommodating the filter,
A strainer configured to filter the fluid to be treated that has flowed into the case from the inlet formed in the case through the filter, and to flow out from the outlet formed in the case,
The above case is a combination of the first divided body and the second divided body,
The first divided body is provided with a coupling portion coupled to the second divided body,
At least one of the filter and the first divided body is provided with a seal portion that is in pressure contact with the other, apart from the coupling portion,
At least one of the filter and the second divided body has a configuration in which a seal portion that is in pressure contact with the other is provided apart from the coupling portion.

In the fourth invention, in any one of the first to third inventions,
The first and second divided bodies have a halved shape having a peripheral wall portion,
In the peripheral wall portion of the first divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a first insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
On the peripheral wall portion of the second divided body, an inner peripheral wall portion and an annular projecting portion forming a second fitting groove portion between the inner peripheral wall portion are formed over the entire circumference,
The outer peripheral side surface of the annular protrusion of the second divided body is positioned so as to face the inner peripheral side surface of the outer peripheral wall portion of the first divided body,
A first overhanging portion that fits into the first fitting groove portion and a second overhanging portion that fits into the second fitting groove portion are formed over the entire circumference on the outer peripheral edge portion of the filter.
On one of the mutually opposing side surfaces of the annular protrusion of the second divided body and the outer peripheral wall portion of the first divided body, a first ridge seal portion that is pressed against the other is formed over the entire circumference,
On at least one of the side surfaces facing each other of the first overhanging portion of the filter and the first fitting groove portion of the first divided body, a second protrusion seal portion that is pressed against the other is formed over the entire circumference.
At least one of the mutually opposing side surfaces of the second overhanging portion of the filter and the second insertion groove portion of the second divided body is formed with a third ridge seal portion that presses against the other over the entire circumference. The configuration.

In a fifth invention, in any one of the first to third inventions,
The first and second divided bodies have a halved shape having a peripheral wall portion,
In the peripheral wall portion of the first divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a first insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
In the peripheral wall portion of the second divided body, an inner peripheral wall portion, an annular protrusion portion that forms a second insertion groove portion between the inner peripheral wall portion, and a third insertion groove portion between the annular protrusion portions are formed. The outermost peripheral wall portion is formed over the entire circumference,
The outer peripheral side surface of the annular protrusion of the second divided body is positioned so as to face the inner peripheral side surface of the outer peripheral wall portion,
The inner peripheral side surface of the outermost peripheral wall portion of the second divided body is positioned so as to face the outer peripheral side surface of the outer peripheral wall portion,
A first overhanging portion that fits into the first fitting groove portion and a second overhanging portion that fits into the second fitting groove portion are formed over the entire circumference on the outer peripheral edge portion of the filter.
The outer peripheral wall portion of the first divided body is fitted into the third insertion groove portion of the second divided body, and at least one of the opposite side surfaces of the outer peripheral wall portion and the third insertion groove portion is in pressure contact with the other. 1 ridge seal part is formed over the entire circumference,
On at least one of the side surfaces facing each other of the first overhanging portion of the filter and the first fitting groove portion of the first divided body, a second protrusion seal portion that is pressed against the other is formed over the entire circumference.
At least one of the mutually opposing side surfaces of the second overhanging portion of the filter and the second insertion groove portion of the second divided body is formed with a third ridge seal portion that presses against the other over the entire circumference. The configuration.

In a sixth invention, in any one of the first to third inventions,
The first and second divided bodies have a halved shape having a peripheral wall portion,
In the peripheral wall portion of the first divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a first insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
An annular projecting portion having an outer peripheral side surface opposed to an inner peripheral side surface of the outer peripheral wall portion is formed on the outer peripheral wall portion outer side of the second divided body so as to protrude toward the first divided body side. ,
On the outer peripheral edge of the filter, a first overhanging portion that is fitted into the first fitting groove is formed over the entire circumference,
The annular projecting portion of the second divided body is fitted into the first fitting groove so as to be positioned on the outer peripheral side from the first overhanging portion,
On one of the mutually opposing side surfaces of the annular projecting portion and the outer peripheral wall portion of the first divided body, a first ridge seal portion that is pressed against the other is formed over the entire circumference,
One of the mutually facing side surfaces of the first projecting portion of the filter and the inner peripheral wall portion of the first divided body, and one of the mutually facing side surfaces of the annular projecting portion of the first projecting portion and the second divided body. Each has a configuration in which a second ridge seal portion that is in pressure contact with the other is formed over the entire circumference.

In a seventh invention, in any one of the first to third inventions,
The first and second divided bodies have a halved shape having a peripheral wall portion,
In the peripheral wall portion of the first divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a first insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
In the peripheral wall portion of the second divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a second insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
A first overhanging portion that fits into the first fitting groove portion and a second overhanging portion that fits into the second fitting groove portion are formed over the entire circumference on the outer peripheral edge portion of the filter.
On one of the inner side surface of the first insertion groove portion of the first divided body and the inner side surface of the first overhang portion of the filter, a first inner peripheral ridge seal portion that is pressed against the other is formed over the entire circumference. ,
On one of the outer side surface of the first insertion groove portion and the outer side surface of the first overhang portion, a first outer peripheral ridge seal portion that is pressed against the other is formed over the entire circumference.
On one of the inner side surface of the second fitting groove portion of the second divided body and the inner side surface of the second overhanging portion of the filter, a second inner peripheral ridge seal portion that is in pressure contact with the other is formed over the entire circumference. ,
On one of the outer side surface of the second insertion groove portion and the outer side surface of the second overhanging portion, a second outer peripheral ridge seal portion that is in pressure contact with the other is formed over the entire circumference.

In an eighth invention, in any one of the first to third inventions,
The first and second divided bodies have a halved shape having a peripheral wall portion,
In the peripheral wall portion of the first divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a first insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
In the peripheral wall portion of the second divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a second insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
On one end of the outer peripheral wall portion of the first divided body and the second divided body, a recess is formed over the entire circumference, while on the other outer peripheral wall end surface, on the opening edge of the recess. Convex parts that are in pressure contact are formed over the entire circumference,
A first overhanging portion that fits into the first fitting groove portion and a second overhanging portion that fits into the second fitting groove portion are formed on the outer peripheral edge of the filter over the entire circumference.
At least one of the first insertion groove portion of the first divided body and the inner side surface and the outer side surface of the first extension portion of the filter facing each other, the first insertion groove portion side or the first extension portion side has a first The ridge seal part is formed over the entire circumference so as to be in pressure contact with the other side,
At least one of the second insertion groove portion of the second divided body and the inner side surface and the outer side surface of the second extension portion of the filter facing each other, the second insertion groove portion side or the second extension portion side has a second It is set as the structure currently formed over the perimeter so that a protrusion seal part may press-contact with the other party.

In a ninth invention, in the first or second invention,
The first and second divided bodies have a halved shape having a peripheral wall portion,
On the open edge side of the peripheral wall portion of the first divided body, there is a projection and a first insertion groove extending between the projection and the outside of the projection, and is opened more than the projection. The first extending wall portion extending to the side is formed over the entire circumference, and the inner side surface of the first insertion groove portion is formed to be inclined so that the groove width gradually increases toward the open side. And
On the other hand, on the open end edge side of the peripheral wall portion of the second divided body, it extends to the open side outside the protrusion and is fitted into the first fit groove portion, and the open side inner edge is the first fit groove portion. The first extending wall portion extends between the second extending wall portion that is in pressure contact with the inner side surface and the second extending wall portion that extends outward from the second extending wall portion. A third extending wall portion having a second insertion groove portion to be inserted is formed over the entire circumference,
The second insertion groove part and the first extension wall part are in pressure contact with the other side on the second insertion groove part side or the first extension wall part side on one of the inner side surface and the outer side surface facing each other. A ridge seal portion is formed over the entire circumference to press-contact the open side inner edge of the extending wall portion to the inner side surface of the first insertion groove portion,
The other of the inner side surface and the outer side surface facing each other of the second insertion groove portion and the first extension wall portion is in pressure contact with each other.

  According to the first aspect of the present invention, the first divided body is provided with the coupling portion coupled to the second divided body, and the seal portion press-contacted with the other is provided on one of the mating portions of the first and second divided bodies. Since it is provided apart from the part, the shape setting of the coupling part and the shape setting of the seal part can be performed individually and appropriately. Therefore, it is possible to achieve both the firm coupling between the divided bodies and the securing of the sealing property between the two divided bodies while taking into account the manufacturing error.

  According to the second invention, since the seal portion is located inside the case with respect to the joint portion, the resin flows into the case when the two divided bodies are joined using the molten resin when the case is manufactured. This can be prevented using the seal portion.

  According to the third invention, the first divided body is provided with the coupling portion coupled to the second divided body, and the seal portion is provided apart from the coupling portion in at least one of the filter and the first divided body. Since the seal part is provided apart from the coupling part in at least one of the two divided bodies, the shape setting of the coupling part and the shape setting of the seal part can be performed individually and appropriately. Therefore, it is possible to achieve both the firm coupling between the divided bodies and the securing of the sealing property between the two divided bodies while taking into account the manufacturing error.

  According to the fourth aspect of the invention, in addition to the annular projecting portion of the second divided body and the side surfaces facing each other of the outer peripheral wall portion of the first divided body being sealed by the first protrusion seal portion, the first of the filter The side surfaces facing each other of the overhang portion and the first insertion groove portion of the first divided body are sealed by the second protrusion seal portion, and the second overhang portion of the filter and the second insertion groove portion of the second division body Since the mutually opposing side surfaces are sealed by the third protrusion seal portion, the sealing performance between the first divided body and the second divided body can be further enhanced by this two-stage sealing structure.

  According to the fifth aspect of the invention, in addition to the fact that the mutually opposing side surfaces of the outer peripheral wall portion of the first divided body and the third insertion groove portion of the second divided body are sealed by the first protrusion seal portion, Side surfaces facing each other of the first overhang portion and the first insertion groove portion of the first divided body are sealed by the second protrusion seal portion, and the second overhang portion of the filter and the second insertion groove portion of the second division body Since the mutually opposing side surfaces are sealed by the third protrusion seal portion, the sealing performance between the first divided body and the second divided body can be further enhanced by this two-stage sealing structure.

  According to the sixth invention, in addition to the annular protrusions of the second divided body and the side surfaces facing each other of the outer peripheral wall portion of the first divided body being sealed by the first protrusion seal portion, the first of the filter The side surfaces facing each other of the projecting portion and the inner peripheral wall portion of the first divided body and the side surfaces facing each other of the first projecting portion of the filter and the annular projecting portion of the second divided body are sealed by the second protrusion seal portion. Therefore, the sealing performance between the first divided body and the second divided body can be further enhanced by the two-stage seal structure.

  According to the seventh aspect of the invention, the first inner circumferential ridge seal portion and the second portion are provided between the first insertion groove portion of the first divided body and the inner side surface and the outer side surface of the first overhang portion of the filter. The inner and outer double seals are achieved by the pressure contact of the outer circumferential ridge seal portion, and the two locations between the second insertion groove portion of the second divided body and the inner side surface and the outer side surface of the second projecting portion of the filter are 2 Since the inner and outer ridge seal portions and the second outer rim seal portion are pressed against each other by double contact, the seal between the first divided body and the second divided body is achieved by the two-stage seal structure. The sex can be further enhanced.

  According to the eighth invention, at least one of the first insertion groove portion of the first divided body and the inner side surface and the outer side surface of the first overhang portion of the filter is sealed by the pressure contact of the first protrusion seal portion. In addition, at least one of the second insertion groove portion of the second divided body and the inner side surface and the outer side surface of the second projecting portion of the filter is sealed by pressure contact of the second protrusion seal portion. The space between the outer peripheral wall end faces of the first divided body and the second divided body is sealed by bringing a convex portion protruding on one side into pressure contact with an opening edge of a concave portion formed on the other side. Therefore, the sealing performance between the first divided body and the second divided body can be further enhanced by these at least two-stage seal structures, that is, the protrusion seal portion and the convex portion.

  According to the ninth aspect, since the protrusion seal portion is formed, the second extending wall portion of the second divided body is pressed inward by the first extending wall portion of the first divided body. The open side inner end edge of the exit wall portion is strongly pressed against the inner side surface of the first insertion groove portion, and the space between the open side inner end edge of the second extension wall portion and the inner side surface of the first insertion groove portion is sealed. Further, by forming a protrusion seal portion on one of the inner side surface and the outer side surface of the second fitting groove portion of the second divided body and the first extension wall portion of the first divided body, the other of the inner side surface and the outer side surface is formed. The side surfaces are pressed against each other to seal the side surfaces. Therefore, the sealing performance between the first divided body and the second divided body can be further enhanced by these at least two-stage seal structures.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

Embodiment 1 of the Invention
1 to 3 show an oil strainer 1 according to Embodiment 1 of the present invention. The oil strainer 1 includes a box-shaped case 3 and a filter 5 accommodated in the case 3, and is disposed in an oil pan of an engine (not shown) and attached to a cylinder block.

  The case 3 is formed so as to extend long in the horizontal direction, and includes a lower case (first divided body) 7 and an upper case (second divided body) 9 which are divided into two in the vertical direction. The lower case 7 and the upper case 9 are formed by molding a resin. The lower case 7 has a concave lower case main body 11, and the upper case 9 has a concave upper case main body 13.

  The lower case body 11 is formed in a U-shaped cross section by a bottom wall portion 15 and a first peripheral wall portion 17 surrounding the bottom wall portion 15. On the other hand, the upper case body 13 is formed in a U-shaped cross section by a top wall portion 21 and a second peripheral wall portion 23 surrounding the top wall portion 21. An inflow port 28 is formed in the vicinity of one end in the longitudinal direction of the bottom wall portion 15 of the lower case body 11, and a cylindrical inflow pipe portion 27 is integrally projected downward from the periphery of the inflow port 28. Yes. On the other hand, an annular projecting portion 29 is integrally projected upward in the vicinity of one end of the top wall portion 21 of the upper case body 13 on the side opposite to the longitudinal inflow pipe portion 27. The annular projecting portion 29 includes a large-diameter cylindrical portion 30 and a small-diameter cylindrical portion 31 that extends upward from the upper portion of the large-diameter cylindrical portion 30. A communicating outlet 29a is formed.

  Further, a plate-like protruding piece portion 33 is provided in the vicinity of the outer upper end of the large-diameter cylindrical portion 30, and a fastening member (not shown) such as a bolt is inserted in the vicinity of the tip end of the protruding piece portion 33. A cylindrical portion 35 having an insertion hole 35a is formed. The cylinder portion 35 is fixed to a peripheral portion of an oil intake port (not shown) of the engine by a bolt inserted into the insertion hole 35a.

  As shown in FIG. 3, the plate-like first flange portion 37 faces the outer side at a position away from the open end edge portion 19 on the outer peripheral side surface of the first peripheral wall portion 17 of the lower case body 11 toward the opposite side. And overhangs the entire circumference. An outer peripheral wall 39 protrudes substantially vertically toward the open side over the entire circumference at the front end of the first flange portion 37 in the protruding direction. , Which is referred to as a tip end portion 39a) protrudes from the open end of the lower case body 11. The distal end of the distal end side portion 39a is formed in a tapered shape so as to be elastically deformable, and the degree of inclination of both the inner and outer side surfaces of the distal end is different. Moreover, the 1st protrusion seal | sticker part 59 is integrally formed over the perimeter in the inner peripheral side surface of the protrusion direction middle of the front end side part 39a. Further, the portion of the first peripheral wall portion 17 above the first flange portion 37 constitutes the inner peripheral wall portion 18 having the open end edge portion 19 as a tip end edge portion. A first insertion groove portion 41 is formed over the entire circumference between a substantially half portion of the outer peripheral wall portion 39 (hereinafter referred to as a proximal end portion 39b) and the inner peripheral wall portion 18. The distal end side portion 39a is located on the outer side of the proximal end side portion 39b, and a stepped portion 39c is formed over the entire circumference on the inner peripheral side of the boundary portion between the distal end side portion 39a and the proximal end side portion 39b. Yes. Further, as shown in FIG. 2, eight locking pieces (joining portions) 57 having insertion holes 55 are provided in the circumferential direction on the outer periphery of the boundary portion between the distal end portion 39a and the proximal end portion 39b. Projected at intervals.

  On the other hand, on the second peripheral wall portion 23 of the upper case body 13, a plate-like second flange portion 49 is located at a position away from the open end edge portion 25 of the second peripheral wall portion 23 on the opposite side to the first flange portion. It has an overhanging dimension longer than 37 and is formed over the entire circumference toward the outside. In the middle of the projecting direction of the second flange portion 49, an annular projecting portion 51 is formed over the entire circumference so as to project toward the lower case 7 side. Further, the portion of the second peripheral wall portion 23 on the open side with respect to the second flange portion 49 constitutes the inner peripheral wall portion 24 having the open end edge portion 25 as the tip end edge portion. A second fitting groove 53 is formed over the entire circumference between the annular protrusion 51 and the inner peripheral wall 24, and the protruding end surface 51 a of the annular protrusion 51 is an open end edge of the second peripheral wall 23. It is flush with the end face of 25.

  And the said 1st insertion groove part 41 and the 2nd insertion groove part 53 are formed facing. That is, the inner peripheral wall portion 18 side surface of the first insertion groove portion 41 and the inner peripheral wall portion 24 side surface of the second insertion groove portion 53 are formed to be flush with each other, and the outer peripheral wall portion 39 side surface of the first insertion groove portion 41 is formed. And the annular protrusion 51 side surface of the second insertion groove 53 are formed to be flush with each other.

  Further, an outermost peripheral wall 43 is provided at the front end of the second flange portion 49 in the projecting direction so as to protrude toward the open side substantially parallel to the annular protrusion 51 over the entire circumference. Between the outermost peripheral wall portion 43 and the annular projecting portion 51, a third insertion groove portion 45 into which the distal end side portion 39a of the outer peripheral wall portion 39 of the lower case 7 is inserted is formed over the entire circumference. The protruding end surface 43 a of the outer peripheral wall portion 43 is flush with the protruding end surface 51 a of the annular protruding portion 51. Further, as shown in FIG. 2, eight retaining pawls 47 are provided at the tip of the outermost peripheral wall 43 so as to correspond to the insertion holes 55 of the locking piece 57 at a predetermined interval in the circumferential direction. It is open and protruding.

  The filter 5 is made of resin and has a plate-like filter main body 61. The filter main body 61 is formed with a large number of pores 61a through which oil passes. At the outer peripheral edge of the filter body 61, a plate-like first overhang 63 extends over the entire circumference of the filter case 61 substantially perpendicularly so as to fit into the first fitting groove 41 of the lower case 7. Is formed. Further, at the outer peripheral edge portion of the filter body 61, the plate-like second overhanging portion 65 is substantially perpendicular to the filter body 61 over the entire circumference so that the second fitting groove portion 53 of the upper case 9 is fitted. Overhang is formed. The inner peripheral surfaces of the first overhang portion 63 and the second overhang portion 65 are formed so as to be flush with each other, and the outer circumferential surfaces thereof are also flush with each other. The tips of the first overhang 63 and the second overhang 65 are tapered so that they can be elastically deformed. Further, in the middle of the projecting direction of the inner peripheral side surface and the outer peripheral side surface of the first projecting portion 63, the second protrusion seal portions 67, 67 that are in pressure contact with both side surfaces of the first insertion groove portion 41 are all provided. It is integrally formed over the circumference. Similarly, in the middle of the projecting direction of the inner peripheral side surface and the outer peripheral side surface of the second projecting portion 65, third projecting seal portions 68, 68 that are in pressure contact with both side surfaces of the second fitting groove portion 53 are provided. It is integrally formed over the entire circumference.

  The lower case body 11 and the upper case body 13 are opposed to each other so that a flow path 69 is formed therein, and the outer peripheral edge of the filter body 61 is connected to the lower case body 11 and the upper case body 13. The retaining claw portion 47 of the upper case 9 is inserted into the insertion hole 55 of the locking piece portion 57 of the lower case 7 while being sandwiched between the open end edges 19 and 25 of the first and second peripheral wall portions 17 and 23. Then, the oil strainer 1 is assembled by being coupled in a state of being locked to the periphery of the insertion hole 55.

  In the oil strainer 1 assembled in this way, the distal end side portion 39a of the outer peripheral wall portion 39 of the lower case 7 is fitted into the third insertion groove portion 45 of the upper case 9, and the inner peripheral side surface of the distal end side portion 39a is While facing the outer peripheral side surface of the annular protrusion 51 of the upper case 9, the outer peripheral side surface of the tip end portion 39 a is opposed to the inner peripheral side surface of the outermost peripheral wall portion 43 of the upper case 9. Further, the first protrusion seal portion 59 on the inner peripheral side surface of the distal end side portion 39 a is in pressure contact with the outer peripheral side surface of the annular projecting portion 51. On the other hand, the outer peripheral side surface of the distal end side portion 39 a is in pressure contact with the inner peripheral side surface of the outermost peripheral wall portion 43 of the upper case 9. Further, the distal end of the distal end side portion 39 a is in pressure contact with the bottom surface of the third insertion groove 45. Further, the first projecting portion 63 of the filter 5 is fitted into the first fitting groove portion 41 of the lower case 7, and the second projecting seal portions 67 on both the inner and outer side surfaces of the first projecting portion 63 are first fitted. While being pressed against both side surfaces of the groove portion 41, that is, the outer peripheral side surface of the inner peripheral wall portion 18 and the inner peripheral side surface of the proximal end portion 39b of the outer peripheral wall portion 39, the tip of the first overhang portion 63 is One press-fit groove 41 is in pressure contact with the bottom surface. Further, the second overhanging portion 65 of the filter 5 is fitted into the second fitting groove portion 53 of the upper case 9, and the third projecting seal portions 68 on both the inner and outer side surfaces of the second overhanging portion 65 are connected to the second overhanging portion 65. The two insertion groove portions 53 are in pressure contact with both the inner and outer side surfaces, that is, the outer peripheral side surface of the inner peripheral wall portion 24 and the inner peripheral side surface of the annular projecting portion 51, and the tip of the second overhang portion 65 is in contact with the second insertion groove portion 53. It is in pressure contact with the bottom surface.

  The oil strainer 1 configured as described above is accommodated in an oil pan and attached to the engine by fastening a bolt to the cylindrical portion 35. When the engine is started in this state, oil in the oil pan is sucked from the cylindrical inflow pipe portion 27, passes through the pore 61a of the filter 5, is filtered, flows out from the outflow port 29a, passes through the oil pump, and slides through the engine. Supplied to the moving part.

  In the present embodiment, such a three-stage seal structure with the first ridge seal portion 59, the second ridge seal portion 67, and the third ridge seal portion 68, compared with the case of Patent Document 1, The sealing performance between the lower case 7 and the upper case 9 can be reliably obtained. In addition, since the tip of the first overhang portion 63 is in pressure contact with the bottom surface of the first insertion groove portion 41, and the tip of the second overhang portion 65 is in pressure contact with the bottom surface of the second insertion groove portion 53, The sealing performance is further ensured. Specifically, during the suction of oil by the oil pump, the oil in the oil pan is prevented from flowing into the flow path 69 of the oil strainer 1 from the gap at the joint between the lower case 7 and the upper case 9 due to the suction force of the oil pump. As a result, supply of unfiltered oil to the engine is prevented. Further, even when the number of revolutions of the oil pump (engine) is suddenly decelerated, the backflowed oil is prevented from leaking out of the oil strainer 1 through the gap between the lower case 7 and the upper case 9.

  As described above, according to the oil strainer 1 according to the first embodiment, the first ridge seal portion 59, the second ridge seal portion 67, the third ridge seal portion 68, and the locking piece portion 57. Since the locking claw 47 and the retaining claw 47 are separated from each other, the shapes of the locking piece 57 and the retaining claw 47 are set, and the first protrusion seal part 59, the second protrusion seal part 67, and the third protrusion. The shape setting of the strip seal portion 68 can be performed individually and appropriately. Therefore, it is possible to achieve both the strong coupling between the lower case 7 and the upper case 9 and the securing of the sealing performance between the two cases 7 and 9 while taking into account manufacturing errors.

  In the above embodiment, the lower case 7 is provided with the locking piece portion 57 as the connecting portion, and the locking claw portion 47 provided on the upper case 9 is locked to the locking piece portion 57 to connect the cases 7 and 9 together. However, the present invention is not limited to this. For example, as in the modification of the first embodiment shown in FIG. 4, the locking piece portion 57 and the retaining claw portion 47 are omitted, and both cases 7 and 9 are made of resin A. May be combined.

  That is, a protrusion 20 that protrudes outward and continuously extends in the circumferential direction is formed on the outer periphery of the boundary portion between the distal end portion 39a and the proximal end portion 39b of the outer peripheral wall portion 39 of the lower case 7. . The protrusion 20 is formed with a resin-filled groove 20a that opens upward in the circumferential direction. On the other hand, a protruding portion 26 that protrudes outward along the protruding portion 20 and extends continuously in the circumferential direction is formed on the distal end side of the outermost peripheral wall portion 43 of the upper case 9. A resin-filled groove 26a that opens downward is continuously formed in the distal end surface of the outermost peripheral wall 43 in the circumferential direction. A resin passage 20b communicating with the resin filling groove 20a is formed in a part in the circumferential direction on the outer peripheral portion of the protruding portion 20. The open portion of the resin filling groove 26a and the open portion of the resin filling groove 20a coincide with each other, and a resin filling space is formed by these resin filling grooves 20a and 26a. The lower case 7 and the upper case 9 are joined by the resin filled in the resin filling grooves 20a and 26a. The protruding portion 20 of the lower case 7 is a coupling portion of the present invention.

  The case where the oil strainer 1 which concerns on this modification is manufactured is demonstrated. After separately molding the lower case 7 and the upper case 9 with a molding die (not shown), the movable case is moved to match the lower case 7 and the upper case 9 without opening and removing the mold, and then the mold is closed. The molten resin is allowed to flow from the resin passage 20b into the resin filling grooves 20a and 26a to be solidified. Such a manufacturing method is possible by using a well-known DSI (die slide injection) method or DRI (die rotary injection) method.

  When filling the resin filling grooves 20a and 26a with resin, the resin tends to flow into the case 3 by the filling pressure, but the sealing property between the lower case 7 and the upper case 9 is ensured as described above. Therefore, the resin A does not reach the inside of the case 3. Therefore, the occurrence of molding defects can be prevented.

  Further, in the first embodiment, the third ridge seal portions 68 are formed on both side surfaces of the second overhang portion 65 of the filter 5, but the third ridge seal portions 68 are formed on the second overhang portion 65. You may project on the both sides | surfaces of the 2nd insertion groove part 53 so that it may press-contact to both sides | surfaces.

<< Embodiment 2 of the Invention >>
FIG. 5 shows an oil strainer 1 according to Embodiment 2 of the present invention. In the first embodiment, the outer peripheral wall 39 and the first fitting groove 41 are formed in the lower case 7, but in the second embodiment, they are formed in the upper case 9. The protruding end surface 39 d of the outer peripheral wall portion 39 is flush with the open end surface of the inner peripheral wall portion 18. A retaining claw 47 is formed at the tip of the outer peripheral wall 39. A first flange portion 37 projects outwardly from the open end edge portion 19 of the lower case body 11, and an annular projecting portion 51 is provided at the end of the first flange portion 37 over the entire circumference. Projecting toward the fitting groove 41. Further, the filter body 61 of the filter 5 is formed with only the first overhanging portion 63 on the upper case 9 side. Then, the annular projecting portion 51 of the lower case 7 is fitted into the first fitting groove portion 41 of the upper case 9 so as to be positioned on the outer peripheral side from the first projecting portion 63 of the filter 5. It is installed side by side. Further, the second protrusion seal portion 67 on the outer peripheral side surface of the first overhanging portion 63 of the filter 5 is in pressure contact with the inner peripheral side surface of the annular projecting portion 51. Further, the tip of the first overhang portion 63 is flat and does not contact the first insertion groove portion 41. Since the other configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  In addition to the outer peripheral side surface of the annular protrusion 51 and the inner peripheral side surface of the outer peripheral wall portion 39 being sealed by the first ridge seal portion 59 of the outer peripheral wall portion 39, the first overhanging portion 63 of the filter 5 is also provided. A two-stage seal structure in which the inner peripheral side surface of the inner peripheral wall 18 and the outer peripheral side surface of the inner peripheral wall portion 18 (second peripheral wall portion 23) (the inner side surface of the first insertion groove portion 41) are sealed by the second protrusion seal portion 67; In addition, the two-stage seal structure in which the outer peripheral side surface of the first projecting portion 63 and the inner peripheral side surface of the annular projecting portion 51 are sealed by the second protrusion seal portion 67, the lower case 7 and the upper case 9 are arranged. The sealing performance can be improved.

  As described above, according to the oil strainer 1 according to the second embodiment, the first ridge seal portion 59 and the second ridge seal portion 67 are separated from the locking piece portion 57 and the retaining claw portion 47. Therefore, as in the first embodiment, it is possible to satisfy both the strong coupling between the lower case 7 and the upper case 9 and the securing of the sealability between the cases 7 and 9.

  Moreover, in this embodiment, since the outermost peripheral wall part 43 is not provided, the oil strainer 1 can be reduced in size compared with the said Embodiment 1. FIG.

  Further, as in the modification shown in FIG. 6, the same protrusions 20 and 26 as in the modification of the first embodiment are provided in the lower case 7 and the upper case 9, and the resin filling grooves 20a and 26a are filled with a molten resin. Thus, the cases 7 and 9 may be joined by the resin A.

<< Embodiment 3 of the Invention >>
FIG. 7 shows an oil strainer 1 according to Embodiment 3 of the present invention. In this Embodiment 3, compared with Embodiment 1, the groove width of the 1st insertion groove part 41 is wide, the protrusion dimension of the outer peripheral wall part 39 is short, and the level | step-difference part 39c is not formed. Further, a second flange portion 49 having an outermost peripheral wall portion 43 and an annular projecting portion 51 protrudes outward from the open end edge portion 25 of the upper case body 13. Furthermore, the filter body 61 of the filter 5 is formed with only the first overhanging portion 63 extending toward the lower case 7 side. Then, the annular projecting portion 51 of the upper case 9 is fitted into the first fitting groove portion 41 of the lower case 7 so as to be positioned on the outer peripheral side from the first projecting portion 63 of the filter 5. It is installed side by side. Further, the second protrusion seal portion 67 on the outer peripheral side surface of the first overhanging portion 63 of the filter 5 is in pressure contact with the inner peripheral side surface of the annular projecting portion 51. Further, the tip of the first overhang portion 63 is flat and does not contact the first insertion groove portion 41. Since the other configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  In addition to the outer peripheral side surface of the annular protrusion 51 and the inner peripheral side surface of the outer peripheral wall portion 39 being sealed by the first ridge seal portion 59 of the outer peripheral wall portion 39, the first overhanging portion 63 of the filter 5 is also provided. A two-stage seal structure in which the inner peripheral side surface of the inner peripheral wall 18 and the outer peripheral side surface of the inner peripheral wall portion 18 (first peripheral wall portion 17) (the inner side surface of the first fitting groove portion 41) are sealed by the second protrusion seal portion 67; Due to the two-stage seal structure in which the outer peripheral side surface of the first overhanging portion 63 and the inner peripheral side surface of the annular projecting portion 51 are sealed by the second ridge seal portion 67, the lower case 7 and the upper case 9 are separated. The sealing performance can be improved.

  As described above, according to the oil strainer 1 according to the third embodiment, the first ridge seal portion 59 and the second ridge seal portion 67 are separated from the locking piece portion 57 and the retaining claw portion 47. Therefore, as in the first embodiment, it is possible to satisfy both the strong coupling between the lower case 7 and the upper case 9 and the securing of the sealability between the cases 7 and 9.

  In the first embodiment, the first ridge seal portion 59 is formed on the inner peripheral side surface of the outer peripheral wall portion 39, but the first ridge seal portion 59 is formed on the outer peripheral side surface of the outer peripheral wall portion 39 and You may make it protrude in the inner peripheral side surface of the outermost peripheral wall part 43, ie, one of the side surfaces which the outer peripheral wall part 39 and the outermost peripheral wall part 43 oppose.

  Moreover, in the said Embodiment 1, while forming the 2nd protrusion seal | sticker part 67 only in one of the inner and outer both sides | surfaces of the 1st overhang | projection part 63 of the filter 5, the inner and outer both sides | surfaces of the 2nd overhang | projection part 65 are formed. You may make it form the 3rd protrusion seal | sticker part 68 only in one of them. Also in this case, a two-stage seal structure with the first ridge seal portion 59 and the second ridge seal portion 67 and a two-stage seal structure with the first ridge seal portion 59 and the third ridge seal portion 68 are used. Thus, the sealing effect is improved as compared with the case of Patent Document 1.

  Further, as in the modification shown in FIG. 8, the same protrusions 20 and 26 as those in the modification of the first embodiment are provided in the lower case 7 and the upper case 9, and the resin filling grooves 20a and 26a are filled with a molten resin. Both cases 7 and 9 may be combined.

  In the first to third embodiments, the first ridge seal portion 59 protrudes from the inner peripheral side surface of the outer peripheral wall portion 39, but the first ridge seal portion 59 is the inner periphery of the outer peripheral wall portion 39. You may protrude in the outer peripheral side surface of the cyclic | annular protrusion part 51 so that it may press-contact with a side surface.

  In the first to third embodiments, the second ridge seal portions 67 protrude from both side surfaces of the first bulge portion 63 of the filter 5. You may protrude from the side surface of the 1st insertion groove part 41, or the inner peripheral side surface of the cyclic | annular protrusion part 51 so that the both sides | surfaces of the part 63 may be press-contacted.

  Moreover, in the said Embodiment 1-3, although the 1st-3rd protrusion seal | sticker part 59,67,68 was press-contacted to the flat location of the surface which opposes, the 1st-3rd protrusion seal | sticker is carried out to the said location. A concave portion into which the portions 59, 67, and 68 are fitted may be provided to ensure sealing performance and to prevent one of the lower case 7 and the upper case 9 from coming out of the other.

<< Embodiment 4 of the Invention >>
9-11 shows the oil strainer 1 which concerns on Embodiment 4 of this invention. Hereinafter, the same components as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 11, a predetermined region extending from the open end edge portion 17a of the first peripheral wall portion 17 to the bottom wall portion 15 side, that is, a region from the first flange portion 37 in the present embodiment, is the inner peripheral wall portion 32. A lower side insertion groove 36 is formed between the inner peripheral wall 32 and the outer peripheral wall 39. The inner side surface and the outer side surface of the lower side insertion groove portion 36 are flat, and the groove width W1 from the open end edge portion 17a of the lower side insertion groove portion 36 to the groove bottom portion is substantially constant over the entire circumference. ing.

  Further, the end surface 39d of the outer peripheral wall portion 39 protrudes slightly to the open side from the open end surface 17b of the first peripheral wall portion 17, and the end surface 39d has a convex section 48 having a triangular cross section having an inner slope and an outer slope. It protrudes integrally over the entire circumference.

  Further, as shown in FIG. 10, reinforcing ribs 57 a are integrally formed at both ends in the circumferential direction of the locking piece portion 57 so as to extend to the opposite side.

  As shown in FIG. 11, the outer peripheral wall portion 56 protrudes from the distal end of the second flange portion 49 in a substantially perpendicular direction toward the open side over the entire circumference. A predetermined region extending from the open end edge portion 23a of the second peripheral wall portion 23 to the top wall portion 21 side, that is, a region from the second flange portion 49 in the present embodiment constitutes the inner peripheral wall portion 58, and the inner peripheral wall portion 58 An upper-side fitting groove portion 60 is formed between the portion 58 and the outer peripheral wall portion 56. The inner side surface and the outer side surface of the upper side insertion groove portion 60 are flat, and the groove width W2 from the open end edge portion 23a of the upper side insertion groove portion 60 to the groove bottom portion is substantially constant over the entire circumference. ing.

  Further, the end surface 56a of the outer peripheral wall portion 56 protrudes slightly to the open side from the open end surface 23b of the second peripheral wall portion 23, and the end surface 56a of the outer peripheral wall portion 56 corresponds to the convex portion 48. A U-shaped recess 62 is formed over the entire circumference. As described above, the open end surface 17 b of the first peripheral wall portion 17 is located on the opposite side of the end surface 39 d of the outer peripheral wall portion 39, and the open end surface 23 b of the second peripheral wall portion 23 is the end surface of the outer peripheral wall portion 56. Since the convex portion 48 is in pressure contact with the opening end edge of the concave portion 62, the open end surface 17b of the first peripheral wall portion 17 and the open end surface 23b of the second peripheral wall portion 23 A gap equivalent to the thickness of the outer peripheral edge 61b of the filter main body 61 is formed between the two.

  At the outer peripheral edge 61 b of the filter body 61, the plate-like first overhang 63 extends over the entire circumference of the filter case 61 substantially perpendicularly so that the plate-like first overhang 63 fits into the lower side fitting groove 36 of the lower case 7. Is formed. In addition, on the outer peripheral edge 61 b of the filter body 61, on the opposite side of the first overhanging portion 63, the plate-like second overhanging portion 65 is fitted in the upper side fitting groove 60 of the upper case 9. It extends over the filter main body 61 substantially vertically. The first overhanging portion 63 and the second overhanging portion 65 have the same plate thickness, and the inner peripheral surfaces thereof are formed to be flush with each other, and the outer peripheral surfaces thereof are also flush with each other. Has been. The tips of the first overhanging portion 63 and the second overhanging portion 65 are tapered so that they can be easily inserted into the lower side insertion groove portion 36 and the upper side insertion groove portion 60. Further, in the middle of the projecting direction of the inner side surface of the first projecting portion 63, the lower side inner peripheral ridge seal portion (first inner peripheral ridge seal portion) that is in pressure contact with the inner side surface of the lower side insertion groove portion 36. 70 is integrally formed over the entire circumference, and in the middle of the outer side surface of the first projecting portion 63 in the projecting direction, the lower outer peripheral ridge seal portion (in contact with the outer side surface of the lower side fitting groove portion 36) ( A first outer peripheral ridge seal portion) 71 is integrally formed over the entire circumference. Similarly, in the middle of the projecting direction of the inner side surface of the second projecting portion 65, the upper side inner peripheral ridge seal portion (second inner peripheral ridge seal portion that presses against the inner side surface of the upper side insertion groove portion 60 is used. ) 73 is integrally formed over the entire circumference, and in the middle of the projecting direction of the outer side surface of the second projecting portion 65, the upper-side outer peripheral ridge seal portion press-contacts with the outer side surface of the upper-side fitting groove portion 60. (Second outer peripheral ridge seal portion) 75 is integrally formed over the entire periphery.

  Then, the filter 5 is placed on the lower case 7 so that the first overhanging portion 63 of the filter 5 is fitted into the lower side fitting groove 36 of the lower case 7, and then the second overhanging portion 65 of the filter 5 is the upper case. The upper case 9 is covered with the filter 5 so as to be fitted into the upper side fitting groove portion 60 of the upper case 9, and the retaining pawl portion 47 of the upper case 9 is inserted into the insertion hole 55 of the locking piece portion 57 of the lower case 7 and inserted. The hole 55 is engaged with the periphery. Thereby, the open sides of the lower case main body 11 and the upper case main body 13 face each other, the flow path 69 is formed inside, and the outer peripheral edge 61b of the filter main body 61 is connected to the lower case main body 11 and the upper case main body 13. The oil strainer 1 is assembled in a state where the first and second peripheral wall portions 17 and 23 (inner peripheral wall portions 32 and 58) are held between the open end edge portions 16a and 23a.

  In the oil strainer 1 assembled in this way, the lower side insertion groove portion 36 and the upper side insertion groove portion 60 face each other, and the inner side surface of the lower side insertion groove portion 36 and the inner side surface of the upper side insertion groove portion 60 are flush with each other. The outer side surface of the lower side insertion groove portion 36 and the outer side surface of the upper side insertion groove portion 60 are flush with each other. Further, the end surface 39 d of the outer peripheral wall portion 39 of the lower case main body 11 and the end surface 56 a of the outer peripheral wall portion 56 of the upper case main body 13 face each other, and the inner slope of the convex portion 48 of the lower case 7 corresponds to the concave portion 62 of the upper case 9. The outer slope of the convex portion 48 is in pressure contact with the outer opening edge of the concave portion 62 while being in pressure contact with the inner opening edge. Further, the lower-side inner circumferential ridge seal portion 70 of the first overhanging portion 63 of the filter 5 is in pressure contact with the inner side surface of the lower-side fitting groove portion 36, and the lower-side outer circumferential ridge of the first overhanging portion 63. The seal portion 71 is in pressure contact with the outer side surface of the lower side insertion groove portion 36. Further, the upper-side inner peripheral ridge seal portion 73 of the second overhanging portion 65 of the filter 5 is in pressure contact with the inner side surface of the upper-side fitting groove portion 60, and the upper-side outer peripheral ridge of the second overhanging portion 65. The seal portion 75 is in pressure contact with the outer side surface of the upper side insertion groove portion 60.

  In the oil strainer 1 of the present embodiment, the lower side inner circumferential ridge seal part 70 and the lower side outer circumferential protrusion are provided at two locations between the inner side surface and the outer side surface of the lower side fitting groove 36 and the first overhanging part 63. The inner side and outer side ridges of the upper side fitting groove 60 and the second overhanging part 65 are sealed between the inner side surface and the outer side surface of the upper side fitting groove part 60 and the second projecting part 65. The seal part 73 and the upper side outer peripheral ridge seal part 75 are sealed in an inner and outer double manner by pressure contact. Further, between the end faces 39d, 56a of the outer peripheral wall portions 39, 56 of the lower case main body 11 and the upper case main body 13, the inner inclined surface and the outer inclined surface of the convex portion 48 become the inner opening edge and the outer opening edge of the concave portion 62, respectively. It is sealed at two locations by pressing. Therefore, the sealing performance between the lower case 7 and the upper case 9 can be improved by sealing the lower case 7 and the upper case 9 with these seal structures.

  As described above, according to the oil strainer 1 according to the fourth embodiment, the lower side inner peripheral ridge seal portion 70, the lower side outer peripheral ridge seal portion 71, the upper side inner peripheral ridge seal portion 73, and the upper side. Since the outer peripheral ridge seal part 75, the locking piece part 57, and the retaining claw part 47 are provided apart from each other, the lower case 7 and the upper case 9 are firmly fixed in consideration of manufacturing errors as in the first embodiment. It is possible to achieve both secure coupling and ensuring the sealing performance between the cases 7 and 9.

  In addition, according to the present embodiment, since the first overhanging portion 63 and the second overhanging portion 65 of the filter 5 have a sealing function, the first overhanging portion 63 and the second overhanging portion 65 are arranged on the lower side. The filter 5 can be firmly and stably held between the lower case 7 and the upper case 9 because it is fitted into the fitting groove 36 and the upper side fitting groove 60 in a press-fitted state.

  In the present embodiment, both the lower side inner peripheral ridge seal portion 70 and the lower side outer peripheral ridge seal portion 71 are provided as the lower side ridge seal portion pressed against the side surface of the lower side insertion groove portion 36. When the seal structure by the convex part 48 and the concave part 62 is provided, only one of them may be provided. Similarly, both the upper side inner peripheral ridge seal portion 73 and the upper side outer peripheral ridge seal portion 75 are provided as upper side ridge seal portions that are in pressure contact with the side surface of the upper side insertion groove portion 60. Good. In addition, only one of the inner slope and the outer slope of the convex portion 48 may be in pressure contact with the inner opening edge or the outer opening edge of the recess 62. Further, when both the lower side inner peripheral ridge seal portion 70 and the lower side outer peripheral ridge seal portion 71 and both the upper side inner peripheral ridge seal portion 73 and the upper side outer peripheral ridge seal portion 75 are provided. May not form the convex part 48 and the concave part 62. Also in these cases, the sealing effect is improved by the two or more stages of the sealing structure as compared with the case of Patent Document 1.

  In the present embodiment, the convex portion 48 is formed on the end surface 39d of the outer peripheral wall portion 39 of the lower case body 11, and the concave portion 62 is formed on the end surface 56a of the outer peripheral wall portion 56 of the upper case main body 13. Conversely, the convex portion 48 may be formed on the end surface 56 a of the outer peripheral wall portion 56 of the upper case main body 13, and the concave portion 62 may be formed on the end surface 39 d of the outer peripheral wall portion 39 of the lower case main body 11.

  Moreover, in this embodiment, in both the inner side surface and outer side surface which the lower side insertion groove part 36 and the 1st overhang | projection part 63 mutually oppose, a lower side protrusion seal | sticker part (lower side inside) The peripheral ridge seal portion 70 and the lower outer peripheral ridge seal portion 71) are formed. The lower ridge seal portion is formed on the lower side insertion groove portion 36 side, and both the inner and outer side surfaces of the first projecting portion 63 are planar. You may form in a shape. Further, a recess 62 is formed over the entire circumference on one outer peripheral wall end face of the lower case main body 11 and the upper case main body 13, and an inner opening edge and an outer opening of the recess 62 are formed on the other outer peripheral wall end face. One of the inner side surface and the outer side surface of the lower side fitting groove portion 36 and the first overhanging portion 63 that face each other, provided that the convex portion 48 that presses against at least one of the end edges protrudes over the entire circumference. Similarly, when the lower side ridge seal portion is provided only on the lower side protrusion groove portion 36, the lower side ridge seal portion is formed on the lower side insertion groove portion 36 side, and both the inner and outer side surfaces of the first projecting portion 63 are formed in a planar shape. May be. Further, similarly, in the present embodiment, the upper side protrusion groove portion 60 and the second overhanging portion 65 on both the inner side surface and the outer side surface of the upper side fitting groove portion 60 and the second overhanging portion 65 facing each other, Side inner peripheral ridge seal portion 73 and upper side outer peripheral ridge seal portion 75) are formed, but the upper side ridge seal portion is formed on the upper side fitting groove portion 60 side and both inner and outer side surfaces of the second overhanging portion 65 are formed. May be formed in a planar shape. Similarly, when the upper side protrusion groove seal portion is provided only on one of the inner side surface and the outer side surface of the upper side fitting groove portion 60 and the second overhanging portion 65 that are opposed to each other, The upper side protrusion seal portion may be formed on the fitting groove portion 60 side, and both the inner and outer side surfaces of the second projecting portion 65 may be formed in a planar shape.

  Further, as in the modification shown in FIG. 12, protrusions 20 and 26 similar to those in the modification of the first embodiment are provided in the lower case 7 and the upper case 9, and the resin filling grooves 20a and 26a are filled with molten resin. Thus, the cases 7 and 9 may be joined by the resin A.

<< Embodiment 5 of the Invention >>
13-15 shows the oil strainer 1 which concerns on Embodiment 5 of this invention. Hereinafter, the same components as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 15, on the open end edge side of the first peripheral wall portion 17 of the lower case main body 11, the protruding portion 16 is integrally formed over the entire circumference so as to protrude toward the open side. At the front end of the first flange portion 37 in the protruding direction, the first extending wall portion 42 extends substantially vertically over the entire circumference so that the first extending wall portion 42 extends outward from the protruding portion 16 on the outer side of the protruding portion 16. It is integrally formed. A tapered flexible seal portion 40 is formed at the tip of the first extension wall portion 42 so that the inner and outer side edges of the tip can be deformed with different inclinations. Further, a ridge seal portion 44 is provided on the inner side surface in the middle of the projecting direction of the first extending wall portion 42 so as to continuously and integrally extend over the entire circumference. A first insertion groove 46 is formed between the first extension wall 42 and the protrusion 16, and the inner side surface 46a of the first insertion groove 46 gradually increases as the groove width increases toward the open side. It is formed so as to be wider. In addition, plate-like first reinforcing ribs 57b that protrude in parallel with each other are integrally formed at both ends in the circumferential direction of the locking piece portion 57 so as to extend to the opposite side, and the locking piece portion 57 protrudes. A plate-like second reinforcing rib 57c is integrally projected at the front end in the direction toward the non-opening side so as to be continuous with the first reinforcing rib 57b.

  On the other hand, on the open end edge side of the second peripheral wall portion 23 of the upper case body 13, the protrusion 22 is integrally formed over the entire circumference so as to protrude toward the open side. On the proximal end side in the extending direction of the second flange portion 49, the second extending wall portion 76 is integrated substantially vertically over the entire circumference so that the second extending wall portion 76 extends outward from the projecting portion 22. Is formed. A triangular groove 77 having a triangular cross section is formed between the second extending wall portion 76 and the protrusion 22, and the inner side surface 77 a of the triangular groove 77 gradually becomes wider as the groove width goes to the open side. It is inclined to become. In addition, at the distal end of the second flange portion 49 in the extending direction, the third extending wall portion 78 is substantially extended over the entire circumference so as to extend outward from the second extending wall portion 76. The extension end surface 78 a of the third extension wall portion 78 is substantially flush with the extension end surface 76 a of the second extension wall portion 76. Further, eight retaining pawls 47 are provided at the distal end of the third extending wall portion 78 at predetermined intervals in the circumferential direction so as to correspond to the insertion holes 55 of the locking piece portion 57 toward the open side. Projecting. Furthermore, a second insertion groove 79 is formed between the third extension wall 78 and the second extension wall 76, and a groove width W3 extending from the open side of the second insertion groove 79 to the groove bottom. Is substantially constant over the entire circumference.

  On both the front and back sides of the outer peripheral edge of the filter main body 61 of the filter 5, filter peripheral wall portions 64 are formed so as to project continuously and integrally over the entire circumference substantially perpendicularly to the filter main body 61. The overhang lengths and plate thicknesses of the filter peripheral wall portions 64 on both the front and back sides are the same, and the inner peripheral surface and the outer peripheral surface thereof are flush with each other. Further, a movement restricting portion 66 protrudes continuously from the protruding end of the filter peripheral wall portion 64 over the entire circumference.

  Here, as described above, the ridge seal portion 44 is formed on the first extension wall portion 42, and the ridge seal portion 44 causes the second extension wall portion 76 to be connected to the second extension wall portion 76. With the base end portion as a fulcrum, the distal end portion bends inward, and the open side inner end edge 76b of the second extension wall portion 76, that is, the extension end surface 76a and the inner side surface of the second extension wall portion 76, Is formed so as to be in pressure contact with the inner side surface 46 a of the first insertion groove 46. Accordingly, in order to facilitate the bending of the second extending wall portion 76 by the protruding seal portion 44, the formation position of the protruding seal portion 44 is set in the vicinity of the extending end surface 76a of the second extending wall portion 76. It is preferable to do. In addition, the inner side surface 46a of the first insertion groove 46 where the open side inner edge 76b of the second extension wall 76 is in pressure contact is pressed against the open side inner edge 76b due to the bending of the second extension wall 76. It is necessary to have an inclined surface.

  Next, the assembly procedure of the oil strainer 1 configured as described above will be described.

  First, the filter 5 is placed on the lower case 7 such that a portion of the protruding end surface of the filter peripheral wall portion 64 of the filter 5 outside the movement restricting portion 66 contacts the protruding end surface of the protrusion 16 of the lower case 7. In this state, the movement restricting portion 66 restricts the filter 5 from moving in the direction along the plate surface of the filter main body 61 with respect to the lower case 7. Next, the retaining claw portion 47 of the upper case 9 is made to correspond to the insertion hole 55 of the locking piece portion 57 of the lower case 7, and the second extending wall portion 76 of the upper case 9 is formed in the first fitting groove portion 46 of the lower case 7. The upper case 9 is put on the filter 5 and the lower case 7 so that the first extending wall portion 46 of the lower case 7 is fitted into the second fitting groove 79 of the upper case 9. At this time, the retaining pawl 47 is inserted into the insertion hole 55 and locked to the periphery of the insertion hole 5. Thereby, the open sides of the lower case main body 11 and the upper case main body 13 face each other, the flow path 69 is formed inside, and the outer peripheral edge of the filter 5 is the first of the lower case main body 11 and the upper case main body 13. And the oil strainer 1 is assembled | attached in the state interposed between the open end edge parts 16a and 23a of the 2nd surrounding wall parts 17 and 23. FIG.

  In the oil strainer 1 assembled in this way, the inner side surfaces of the second insertion groove 79 and the first extending wall 42 are sealed by pressure contact with the ridge seal portion 44. Further, the second extending wall portion 76 is pressed inward by the first extending wall portion 42 by the pressure contact of the protrusion seal portion 44, and the open side inner edge 76b of the second extending wall portion 76 is The inner side surface 46a of the one insertion groove 46 is strongly pressed, and the space between the open side inner edge 76b and the inner side surface 46a is sealed. Further, the outer side surfaces of the second insertion groove portion 79 and the first extension wall portion 42 are pressed against each other and sealed, and the distal end of the flexible seal portion 40 is pressed against and sealed against the bottom surface of the second insertion groove portion 79. Yes. Therefore, the sealing performance between the lower case 7 and the upper case 9 can be enhanced by these seal structures. Further, the outer side surface of the third extending wall portion 78 is in pressure contact with the outer peripheral edge of the insertion hole 55 of the locking piece portion 57.

  As described above, according to the oil strainer 1 according to the fifth embodiment, the protrusion seal portion 44 and the flexible seal portion 40 are provided separately from the locking piece portion 57 and the retaining claw portion 47. Therefore, similarly to the first embodiment, it is possible to achieve both the firm connection between the lower case 7 and the upper case 9 and the securing of the sealing property between the cases 7 and 9.

  In the above embodiment, the first insertion groove 46 and the first extension wall 42 are provided in the lower case 7, and the second insertion groove 79, the second extension wall 76, and the third extension wall 78 are upper. Contrary to this, the first insertion groove portion 46 and the first extension wall portion 42 are provided in the upper case 9, and the second insertion groove portion 79, the second extension wall portion 76, and the third The extending wall 78 may be provided in the lower case 7.

  Moreover, in the said embodiment, although the protrusion seal | sticker part 44 was formed in the inner side surface of the 1st extension wall part 42, and the outer side surface of the 1st extension wall part 42 was formed in planar shape, the 1st extension wall The inner side surface of the portion 42 may be formed in a planar shape, and the ridge seal portion 44 may be formed on the inner side surface of the second insertion groove portion 79. That is, the ridge seal portion 44 is formed not on the first extending wall portion 42 side on the inner side surfaces of the second inserting groove portion 79 and the first extending wall portion 42 facing each other, but on the second inserting groove portion 79 side. May be.

  In addition, the inner side surface of the first extending wall portion 42 is formed in a planar shape, and the second seal portion 44 is formed on the outer side surface of the second extending groove portion 79 and the first extending wall portion 42 facing each other. You may form in the insertion groove part 79 side or the 1st extension wall part 42 side. Even in this case, if the inner side surface of the first extending wall portion 42 is in pressure contact with the outer side surface of the second extending wall portion 76, the second extending wall portion 76 is moved inward by the first extending wall portion 42. The opening side inner edge 76b of the second extending wall portion 76 is more strongly pressed against the inner side surface 46a of the first fitting groove portion 46.

  Moreover, in the said embodiment, although the protrusion seal | sticker part 44 was continuously provided in the 1st extension wall part 42 over the perimeter, you may provide intermittently discontinuously.

  Further, in the above embodiment, the triangular groove 77 is formed inside the base end portion of the second extending wall portion 76 in the upper case 9, but the open end edge portion of the upper case 9 is formed without forming the triangular groove 77. You may make it 22a and the base end part inner side of the 2nd extension wall part 76 orthogonally cross.

  Moreover, in the said embodiment, although the flexible seal | sticker part 40 was provided in the front-end | tip of the 1st extension wall part 42, it does not necessarily need to provide and the front-end | tip of the 1st extension wall part 42 is set to the 2nd insertion groove part. You may form flatly so that it may not contact | abut to the bottom face of 79.

  In the above embodiment, the filter 5 has the filter peripheral wall portion 64. However, the filter 5 is configured only by the plate-like filter body 61, and the outer peripheral edge of the filter body 61 is the lower case body 11 and the upper case body. You may make it hold | maintain directly at the open end edge parts 16a and 23a of 13 1st and 2nd surrounding wall parts 17 and 23.

  Further, as in the first modification shown in FIG. 16, the same protrusions 20 and 26 as those in the first embodiment are provided in the lower case 7 and the upper case 9, and the resin filling grooves 20a and 26a are filled with molten resin. Thus, the cases 7 and 9 may be joined by the resin A.

  Further, as in Modification 2 shown in FIG. 17, the ridge seal portion 44 may be provided on the outer side surface of the first extension wall portion 42. In the second modification, the inner wall 20d of the resin filling groove 20a and the inner wall 26d of the resin filling groove 26a overlap in the inner and outer directions. The surface of the inner wall 20d that is in contact with the inner wall 26d is inclined so as to be positioned closer to the resin filling groove 26a toward the tip side. Further, the surface of the inner wall 26d in contact with the inner wall 20d is inclined so as to move away from the resin filling groove 20a toward the tip side. Further, the tip of the ridge seal portion 44 is in contact with the inner wall 26d. Since the surfaces of the inner side wall 20d and the inner side wall 26a that are in contact with each other are inclined as described above, when the lower case 7 and the upper case 9 are combined, the inner side wall 26d is projected by the inner side wall 20d into the ridge seal portion 44. By pushing to the side, the sealing performance by the ridge seal portion 44 is further improved.

  Further, the present invention can be used for various power machines such as an automatic transmission other than the engine.

  As described above, the strainer according to the present invention is suitable for installation in an engine or an automatic transmission, for example.

1 is a perspective view of an oil strainer according to Embodiment 1. FIG. 1 is an exploded perspective view of an oil strainer according to Embodiment 1. FIG. It is the III-III sectional view taken on the line in FIG. FIG. 6 is a view corresponding to FIG. 3 according to a modification of the first embodiment. FIG. 3 is a diagram corresponding to FIG. 3 according to a second embodiment. FIG. 9 is a view corresponding to FIG. 3 according to a modification of the second embodiment. FIG. 6 is a view corresponding to FIG. 3 according to the third embodiment. FIG. 10 is a view corresponding to FIG. 3 according to a modification of the third embodiment. FIG. 6 is a view corresponding to FIG. 1 according to a fourth embodiment. FIG. 6 is a view corresponding to FIG. 2 according to a fourth embodiment. It is the XI-XI sectional view taken on the line in FIG. FIG. 11 is a view corresponding to FIG. 11 according to a modification of the fourth embodiment. FIG. 10 is a view corresponding to FIG. 1 according to a fifth embodiment. FIG. 9 is a view corresponding to FIG. 2 according to a fifth embodiment. It is FIG. 1 equivalent view which concerns on XV-XV in FIG. FIG. 16 is a diagram corresponding to FIG. 15 according to Modification 1 of Embodiment 5. FIG. 16 is a diagram corresponding to FIG. 15 according to a second modification of the fifth embodiment.

Explanation of symbols

1 Strainer 3 Case 5 Filter 7 Lower Case (First Division)
9 Upper case (second divided body)
16 Protrusion 17 First peripheral wall 18 Inner peripheral wall 20 Protruding part (joining part)
23 Second peripheral wall portion 24 Inner peripheral wall portion 28 Inlet port 29a Outlet port 39 Outer peripheral wall portion 40 Flexible seal portion 41 First fitting groove portion 42 First extending wall portion 43 Outermost peripheral wall portion 44 Projection seal portion 45 Third Insertion groove 48 Protrusion 51 Annular protrusion 53 Second insertion groove 57 Locking piece (joint)
59 First ridge seal portion 61 Filter body 61a Fine hole 62 Recess 63 First overhang portion 65 Second overhang portion 67 Second ridge seal portion 68 Third ridge seal portion 69 Flow path 70 Lower side inner circumferential protrusion Strip seal (first inner circumferential ridge seal)
71 Lower outer peripheral ridge seal part (first outer peripheral ridge seal part)
73 Upper side inner rim seal part (second inner rim seal part)
75 Upper outer peripheral ridge seal part (second outer peripheral ridge seal part)
76 2nd extension wall part 78 3rd extension wall part A Resin

Claims (9)

Filters,
A case for accommodating the filter,
A strainer configured to filter the fluid to be treated that has flowed into the case from the inlet formed in the case through the filter, and to flow out from the outlet formed in the case,
The above case is a combination of the first divided body and the second divided body,
The first divided body is provided with a coupling portion coupled to the second divided body,
A strainer, wherein at least one of the mating portions of the first and second divided bodies is provided with a seal portion that is in pressure contact with the other, separated from the coupling portion. The strainer according to claim 1, wherein
The connecting portion of the first divided body is bonded to the second divided body by a resin,
The strainer is characterized in that the seal portion is positioned inside the case with respect to the coupling portion. Filters,
A case for accommodating the filter,
A strainer configured to filter the fluid to be treated that has flowed into the case from the inlet formed in the case through the filter, and to flow out from the outlet formed in the case,
The above case is a combination of the first divided body and the second divided body,
The first divided body is provided with a coupling portion coupled to the second divided body,
At least one of the filter and the first divided body is provided with a seal portion that is in pressure contact with the other, apart from the coupling portion,
A strainer, wherein at least one of the filter and the second divided body is provided with a seal portion that is in pressure contact with the other, separated from the coupling portion. The strainer according to any one of claims 1 to 3,
The first and second divided bodies have a halved shape having a peripheral wall portion,
In the peripheral wall portion of the first divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a first insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
On the peripheral wall portion of the second divided body, an inner peripheral wall portion and an annular projecting portion forming a second fitting groove portion between the inner peripheral wall portion are formed over the entire circumference,
The outer peripheral side surface of the annular protrusion of the second divided body is positioned so as to face the inner peripheral side surface of the outer peripheral wall portion of the first divided body,
A first overhanging portion that fits into the first fitting groove portion and a second overhanging portion that fits into the second fitting groove portion are formed over the entire circumference on the outer peripheral edge portion of the filter.
On one of the mutually opposing side surfaces of the annular protrusion of the second divided body and the outer peripheral wall portion of the first divided body, a first ridge seal portion that is pressed against the other is formed over the entire circumference,
On at least one of the side surfaces facing each other of the first overhanging portion of the filter and the first fitting groove portion of the first divided body, a second protrusion seal portion that is pressed against the other is formed over the entire circumference.
At least one of the mutually opposing side surfaces of the second overhanging portion of the filter and the second insertion groove portion of the second divided body is formed with a third ridge seal portion that presses against the other over the entire circumference. A strainer characterized by that. The strainer according to any one of claims 1 to 3,
The first and second divided bodies have a halved shape having a peripheral wall portion,
In the peripheral wall portion of the first divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a first insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
In the peripheral wall portion of the second divided body, an inner peripheral wall portion, an annular protrusion portion that forms a second insertion groove portion between the inner peripheral wall portion, and a third insertion groove portion between the annular protrusion portions are formed. The outermost peripheral wall portion is formed over the entire circumference,
The outer peripheral side surface of the annular protrusion of the second divided body is positioned so as to face the inner peripheral side surface of the outer peripheral wall portion,
The inner peripheral side surface of the outermost peripheral wall portion of the second divided body is positioned so as to face the outer peripheral side surface of the outer peripheral wall portion,
A first overhanging portion that fits into the first fitting groove portion and a second overhanging portion that fits into the second fitting groove portion are formed over the entire circumference on the outer peripheral edge portion of the filter.
The outer peripheral wall portion of the first divided body is fitted into the third insertion groove portion of the second divided body, and at least one of the opposite side surfaces of the outer peripheral wall portion and the third insertion groove portion is in pressure contact with the other. 1 ridge seal part is formed over the entire circumference,
On at least one of the side surfaces facing each other of the first overhanging portion of the filter and the first fitting groove portion of the first divided body, a second protrusion seal portion that is pressed against the other is formed over the entire circumference.
At least one of the mutually opposing side surfaces of the second overhanging portion of the filter and the second insertion groove portion of the second divided body is formed with a third ridge seal portion that presses against the other over the entire circumference. A strainer characterized by that. The strainer according to any one of claims 1 to 3,
The first and second divided bodies have a halved shape having a peripheral wall portion,
In the peripheral wall portion of the first divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a first insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
An annular projecting portion having an outer peripheral side surface opposed to an inner peripheral side surface of the outer peripheral wall portion is formed on the outer peripheral wall portion outer side of the second divided body so as to protrude toward the first divided body side. ,
On the outer peripheral edge of the filter, a first overhanging portion that is fitted into the first fitting groove is formed over the entire circumference,
The annular projecting portion of the second divided body is fitted into the first fitting groove so as to be positioned on the outer peripheral side from the first overhanging portion,
On one of the mutually opposing side surfaces of the annular projecting portion and the outer peripheral wall portion of the first divided body, a first ridge seal portion that is pressed against the other is formed over the entire circumference,
One of the mutually facing side surfaces of the first projecting portion of the filter and the inner peripheral wall portion of the first divided body, and one of the mutually facing side surfaces of the annular projecting portion of the first projecting portion and the second divided body. The strainer is characterized in that a second ridge seal portion that is in pressure contact with the other is formed over the entire circumference. The strainer according to any one of claims 1 to 3,
The first and second divided bodies have a halved shape having a peripheral wall portion,
In the peripheral wall portion of the first divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a first insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
In the peripheral wall portion of the second divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a second insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
A first overhanging portion that fits into the first fitting groove portion and a second overhanging portion that fits into the second fitting groove portion are formed over the entire circumference on the outer peripheral edge portion of the filter.
On one of the inner side surface of the first insertion groove portion of the first divided body and the inner side surface of the first overhang portion of the filter, a first inner peripheral ridge seal portion that is pressed against the other is formed over the entire circumference. ,
On one of the outer side surface of the first insertion groove portion and the outer side surface of the first overhang portion, a first outer peripheral ridge seal portion that is pressed against the other is formed over the entire circumference.
On one of the inner side surface of the second fitting groove portion of the second divided body and the inner side surface of the second overhanging portion of the filter, a second inner peripheral ridge seal portion that is in pressure contact with the other is formed over the entire circumference. ,
The strainer is characterized in that a second outer circumferential ridge seal portion that presses against the other is formed over the entire circumference on one of the outer side surface of the second fitting groove and the outer side surface of the second overhanging portion. . The strainer according to any one of claims 1 to 3,
The first and second divided bodies have a halved shape having a peripheral wall portion,
In the peripheral wall portion of the first divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a first insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
In the peripheral wall portion of the second divided body, an inner peripheral wall portion and an outer peripheral wall portion forming a second insertion groove portion between the inner peripheral wall portion are formed over the entire circumference,
On one end of the outer peripheral wall portion of the first divided body and the second divided body, a recess is formed over the entire circumference, while on the other outer peripheral wall end surface, on the opening edge of the recess. Convex parts that are in pressure contact are formed over the entire circumference,
A first overhanging portion that fits into the first fitting groove portion and a second overhanging portion that fits into the second fitting groove portion are formed on the outer peripheral edge of the filter over the entire circumference.
At least one of the first insertion groove portion of the first divided body and the inner side surface and the outer side surface of the first extension portion of the filter facing each other, the first insertion groove portion side or the first extension portion side has a first The ridge seal part is formed over the entire circumference so as to be in pressure contact with the other side,
At least one of the second insertion groove portion of the second divided body and the inner side surface and the outer side surface of the second extension portion of the filter facing each other, the second insertion groove portion side or the second extension portion side has a second A strainer, characterized in that the ridge seal portion is formed over the entire circumference so as to be in pressure contact with the other side. The strainer according to claim 1 or 2,
The first and second divided bodies have a halved shape having a peripheral wall portion,
On the open edge side of the peripheral wall portion of the first divided body, there is a projection and a first insertion groove extending between the projection and the outside of the projection, and is opened more than the projection. The first extending wall portion extending to the side is formed over the entire circumference, and the inner side surface of the first insertion groove portion is formed to be inclined so that the groove width gradually increases toward the open side. And
On the other hand, on the open end edge side of the peripheral wall portion of the second divided body, it extends to the open side outside the projection and is fitted into the first insertion groove portion, and the open side inner edge is the first insertion groove portion. The first extending wall portion extends between the second extending wall portion that is in pressure contact with the inner side surface and the second extending wall portion that extends outward from the second extending wall portion. A third extending wall portion having a second insertion groove portion to be inserted is formed over the entire circumference,
The second insertion groove part and the first extension wall part are in pressure contact with the other side on the second insertion groove part side or the first extension wall part side on one of the inner side surface and the outer side surface facing each other. A ridge seal portion is formed over the entire circumference to press-contact the open side inner edge of the extending wall portion to the inner side surface of the first insertion groove portion,
The strainer, wherein the other of the inner side surface and the outer side surface of the second fitting groove portion and the first extending wall portion facing each other is in pressure contact with each other.

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